"'Who Are the Brain Police?' asks listeners if the music they listen to would cease to bring them pleasure if the packaging and material fetishes surrounding it were to suddenly disappear. It uses the record album as a model, asking what we’d do if the label were to come off and the plastic were to melt. The middle of this tune about attention to decorum rather than substance is interrupted by a snippet of 'Help, I'm A Rock' from later on the album, although the part’s longer here than within its actual piece. This might simply be done to make the song even more eerie, or perhaps to 'jolt the listener out of any comfort brought on by identification with this music,' as Kevin Courrier writes. This isn’t the last time Frank will play with the listener’s trained impulse to seize on formulaic music; on the Money album, the sound of a phonograph needle jumping out of a catchy song will frequently keep the ear from getting too used to the pleasant hooks."

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"A lot of people police their own brains. They're like citizen soldiers, so to speak. I've seen people who will willingly arrest, try and punish their own brains. Now that's really sad. That's vigilante brain policism. It's not even official, it's like self-imposed. It's hard to pin it down to one central agency when you realize that so many people are willing to do it to themselves. I mean, the people who want to become amateur brain police, their numbers grow every day - people who say to themselves, 'I couldn't possibly consider that', and then spank themselves for even getting that far. So, you don't even need to blame it on a central brain police agency. You've got plenty of people who willingly subject themselves to this self-mutilation."

FZ: "The heaviest stuff on there is 'It Can't Happen Here' and 'Who Are The Brain Police?' Nobody's penetrated 'Brain Police' - yet."

FK: "Who are the Brain Police?"

FZ: "I can't tell you that - it's a religious song. But the ones who say they like 'Brain Police' like it because it's got some screaming and they love it. The ones that like 'Help, I'm A Rock', you know that mumbling part at the end, haven't come to realize what the musical structure of that is. They'll perceive it because it's got some gag lines in it."

"A free-form nightmare built from mechanical imagery, 'Who Are The Brain Police?' has the strangest instumental break ever recorded – unidentifiable noises superimposed on top of each other including voices babbling indistinguishably, a bass electric guitar being tortured to death and what sounds like a factory steam whistle chorus."